Vintage posters of America's national parks – in pictures; Guardian, 8/26/16

Sarah Gilbert, Guardian; Vintage posters of America's national parks – in pictures:

"A collection of posters created to promote tourism to the national parks is part of the creative legacy of the New Deal developed by Franklin D Roosevelt. Between 1938 and 1941, the Works Progress Administration and its Federal Arts Project designed a series of artworks promoting, and inspired by, the landscapes and wildlife of the parks. The collection is housed in the Library of Congress"